Skuttle Indoor Air Quality Products Skuttle Make Up Air Diffuser D 28 6 User Manual

Installation Instructions for the  
Skuttle Make-Up Air Diffuser  
Model No. D-28-6  
READ AND SAVE THESE INSTRUCTIONS  
SIZE: 19-1/4 in. (48.90 cm) H x 9-1/2 in. (24.13 cm) W x 9-1/2 in. (24.13 cm) D  
The Skuttle Make-Up Air Diffuser allows clean, fresh  
air to enter your home whenever there is a negative  
air pressure buildup or a need for replacement (make-  
up) air.  
(e.g., an exhaust vent, sewer vent, dryer vent or  
combustion outlet.  
3. Install the 6 in. (15.24 cm) flexible duct (not sup-  
plied) between the Diffuser and the inlet hood.  
NOTE: The Diffuser may be attached directly to the  
furnace cabinet. It may also be installed on a nearby  
wall or substantial support structure, but must be in-  
stalled within 1 ft. (30.48 cm) of the furnace cabi-  
net. (See diagram above.)  
NOTE: Flexible duct tubing is not supplied be-  
cause lengths vary greatly from home to home.  
4. Tape and seal all joints. Insulate the tubing in ar-  
eas where outdoor winter temperatures drop to  
32°F (0°C) or lower, or where water damage could  
occur.  
CAUTION: Be sure to follow all local codes and or-  
dinances.  
CAUTION: In homes with extreme negative pres-  
sures, the influx of cold outdoor air into the Diffuser  
may reduce temperatures in the surrounding area,  
possibly resulting in freezing conditions. In cold re-  
gions where this could occur, insulate plumbing  
or supply additional heat to the area.  
INSTALLATION INSTRUCTIONS  
1. Mount the Diffuser in a vertical position with the #8  
sheet metal screws provided.  
DANGER: Do not drill into electrical wiring or re-  
frigeration lines during installation.  
2. Select a location for the outside air intake vent. Cut  
the outside opening to allow room for a 6 in. (15.24  
cm) diameter duct to be installed.  
CAUTION: To prevent contaminated air from en-  
tering the inlet, make sure the Diffuser is at least  
10 ft. (3.05 m) from any discharge source  
Phone: 888-SKUTTLE (758-8853) or 740-373-9169  
© Skuttle Mfg. Co., 2008 • WEB-0756-251 • 4/08  

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